Disclosed is a blended gasoline composition having an AKI of 87. The formulation of the blended gasoline composition leads to a reduction in carbon dioxide emission. The blended gasoline composition contains a reduced concentration of olefins and non-amine aromatics.
|
20. A blended gasoline composition comprising:
an aromatic amine in concentrations ranging from about 0.1% to about 5% by volume;
ethanol in concentrations between about 10% and about 20%;
non-amine aromatic hydrocarbons in concentrations up to about 5%;
olefins in concentrations up to about 4%;
paraffins in concentrations up to about 86%.
1. A blended gasoline composition comprising:
an aromatic amine in concentrations ranging from about 0.1% to about 5% by volume;
ethanol in concentrations between about 10% and about 20%;
non-amine aromatic hydrocarbons in concentrations up to about 15%;
olefins in concentrations up to about 8%;
paraffins in concentrations up to about 90%.
32. A blended gasoline composition comprising:
an aromatic amine selected from the group consisting of m-toluidine, p-toluidine, o-toluidine and aniline as well as mixtures of the identified compounds in concentrations ranging from about 0.1% to about 5% by volume;
ethanol in concentrations between about 10% and about 20%;
paraffins in concentrations up to about 86%; and,
wherein said blended gasoline composition is substantially free of non-amine aromatic compounds.
2. The blended gasoline composition of
3. The blended gasoline composition of
4. The blended gasoline composition of
5. The blended gasoline composition of
6. The blended gasoline composition of
8. The blended gasoline composition of
9. The blended gasoline composition of
10. The blended gasoline composition of
11. The blended gasoline composition of
12. The blended gasoline composition of
from about 70% to about 90% paraffin;
from about 0% to about 8% olefins;
from about 0% to about 10% naphthenes; and,
from about 0% to about 15% aromatics.
13. The blended gasoline composition of
hydrocarbons having four carbon atoms from about 0% to about 10% by volume;
hydrocarbons having five carbon atoms and hydrocarbons having six carbon atoms from about 25% to about 40% by volume;
hydrocarbons having seven carbon atoms and hydrocarbons having eight carbon atoms from about 30% to about 50% by volume;
hydrocarbons having nine carbon atoms and hydrocarbons having ten carbon atoms from about 3% to about 30% by volume;
hydrocarbons having eleven carbon atoms and hydrocarbons having twelve carbon atoms from about 0% to about 25% by volume; and,
hydrocarbons having at least thirteen carbon atoms from about 0% to about 5% by volume.
14. The blended gasoline composition of
15. The blended gasoline composition of
16. The blended gasoline composition of
17. The blended gasoline composition of
18. The blended gasoline composition of
19. The blended gasoline composition of
21. The blended gasoline composition of
22. The blended gasoline composition of
23. The blended gasoline composition of
from about 70% to about 90% paraffin;
from about 0% to about 8% olefins;
from about 0% to about 10% naphthenes; and,
from about 0% to about 15% aromatics.
24. The blended gasoline composition of
hydrocarbons having four carbon atoms from about 0% to about 10% by volume;
hydrocarbons having five carbon atoms and hydrocarbons having six carbon atoms from about 25% to about 40% by volume;
hydrocarbons having seven carbon atoms and hydrocarbons having eight carbon atoms from about 30% to about 50% by volume;
hydrocarbons having nine carbon atoms and hydrocarbons having ten carbon atoms from about 3% to about 30% by volume;
hydrocarbons having eleven carbon atoms and hydrocarbons having twelve carbon atoms from about 0% to about 25% by volume; and,
hydrocarbons having at least thirteen carbon atoms from about 0% to about 5% by volume.
25. The blended gasoline composition of
26. The blended gasoline composition of
27. The blended gasoline composition of
28. The blended gasoline composition of
29. The blended gasoline composition of
30. The blended gasoline composition of
31. The blended gasoline composition of
33. The blended gasoline composition of
34. The blended gasoline composition of
from about 70% to about 90% paraffin;
from about 0% to about 8% olefins;
from about 0% to about 10% naphthenes; and,
from about 0% to about 15% aromatics.
35. The blended gasoline composition of
hydrocarbons having four carbon atoms from about 0% to about 10% by volume;
hydrocarbons having five carbon atoms and hydrocarbons having six carbon atoms from about 25% to about 40% by volume;
hydrocarbons having seven carbon atoms and hydrocarbons having eight carbon atoms from about 30% to about 50% by volume;
hydrocarbons having nine carbon atoms and hydrocarbons having ten carbon atoms from about 3% to about 30% by volume;
hydrocarbons having eleven carbon atoms and hydrocarbons having twelve carbon atoms from about 0% to about 25% by volume; and,
hydrocarbons having at least thirteen carbon atoms from about 0% to about 5% by volume.
36. The blended gasoline composition of
37. The blended gasoline composition of
38. The blended gasoline composition of
39. The blended gasoline composition of
40. The blended gasoline composition of
41. The blended gasoline composition of
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Formulations of commercial motor gasoline that are designed to reduce carbon dioxide emission are highly desired around the world. To provide the necessary octane levels for regular and premium grade gasoline, current commercially available automobile motor gasoline formulations include manufactured aromatic hydrocarbons. Aromatic hydrocarbons are manufactured from hydrogen rich paraffins and naphthenic molecules found in naphtha by a catalytic reforming process. The catalytic reforming process yields a product commonly referred to as “reformate” which has a significantly higher anti-knock index (AKI) value (R+M/2). Use of catalytic reformers contribute to carbon dioxide emission in four fundamental ways. First, it raises the carbon intensity of the fuel by removing hydrogen from the paraffins and naphthenic molecules to produce the aromatics. Second, it lowers the energy content per lb. of fuel since aromatics have lower energy content; and, thus increases the amount of fuel burned for the same energy released. Third, hydrogen rich fuel gas, a by-product, is produced in the process by cracking reactions. This results in an unwanted yield loss, raising the feedstock volume of naphtha required to produce the desired amount of reformate and subsequently increasing fossil fuel usage. And fourth, the reformation process requires high temperatures which in turn increases the release of carbon dioxide.
Therefore, the provision of a blended gasoline composition prepared by processes which lower carbon dioxide emission during the manufacturing process and provide lower carbon dioxide emission upon combustion would significantly improve the environment.
Disclosed herein is a blended gasoline composition formulated to reduce emissions of carbon. The blended gasoline composition comprises:
Also disclosed herein is a blended gasoline composition formulated to reduce emissions of carbon. The blended gasoline composition comprises:
The present disclosure may be understood more readily by reference to these detailed descriptions. In addition, numerous specific details are set forth in order to provide a thorough understanding of the various embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. The description is not to be considered as limiting the scope of the embodiments described herein. Also, it is to be understood that the phraseology and terminology employed herein is for the purpose of description and should not be regarded as limiting except where indicated as such.
Throughout this disclosure, the terms “about”, “approximate”, and variations thereof, are used to indicate that a value includes the inherent variation or error for the device, system, the method being employed to determine the value, or the variation that exists among the study subjects. Unless otherwise stated herein all formulations are provided as a percent by volume basis.
The following disclosure provides a blended gasoline composition suitable for use in over the road vehicles and off road vehicles. The disclosed blended gasoline composition is compatible with all current versions of gasoline intended for use in over the road vehicles and off road vehicles. Additionally, the disclosed blended gasoline composition can be distributed without significant modification to the current fuel distribution system. As will be described in more detail below, the disclosed blended gasoline composition produces significantly lower carbon dioxide emissions than currently available versions of gasoline. As a further benefit, the disclosed blended gasoline composition, when compared to currently used gasoline compositions, has energy values equal to or better than the current gasoline compositions due to their higher paraffinic content.
The disclosed blended gasoline composition achieves the reduction in carbon dioxide emissions by substantially eliminating aromatic compounds from the formulation of the blended gasoline composition. The target maximum concentration of aromatic compositions within the blended gasoline composition is less than 15% by volume, not including aromatic amines. More typically, the blended gasoline composition will have less than 10% aromatic content, not including aromatic amines. Even more typically, the blended gasoline composition will have less than 5% aromatic content, not including aromatic amines. Preferably, the blended gasoline composition will have 0% aromatic content, not including aromatic amines.
The disclosed blended gasoline composition also reduces emissions by limiting the amount of olefins, also known as alkenes, in the composition. Typically, the blended gasoline composition will have less than 10% by volume olefins. More typically, the blended gasoline composition will have less than 8% olefin content. More commonly, the blended gasoline composition will have less than 5% olefin content. Preferably, the blended gasoline composition will have 0% olefin content.
The disclosed blended gasoline composition includes a base fuel blend of hydrocarbons as commonly produced by most refineries. The base fuel blend contains hydrocarbons having chain lengths as commonly produced by refinery units such as hydrocrackers, isomerization units, alkylation units, hydrodesulfurization units, and optionally fluid catalytic cracker units and optionally reformers. Thus, products commonly known in the industry as alkylate, reformate, FCCU gasoline, isomerate and naphtha may be included in the base fuel blend. Such units typically produce hydrocarbons having chains lengths of about four carbon atoms to about 12 carbon atoms (C4 to C12). More typically, the base fuel blend will have from five carbon atoms to 12 carbon atoms (C5 to C12). Such hydrocarbons include, but are not limited to, paraffins, olefins, naphthene and aromatic hydrocarbons. As discussed above, the olefin and aromatic constituents are preferably of limited concentrations or eliminated. Typically, the base fuel blend will make up about 70% to about 90% by volume of the total blended gasoline composition.
One suitable base fuel blend can be obtained from renewable diesel and jet fuel manufacturing plants. Such base fuel blend will be characterized as having an anti-knock index (AKI=RON+MON/2) between about 50 and about 60, typically 55, where RON is research octane number and MON is motor octane number. Additionally, the following blending strategy is suitable for use with CBOB, RBOB and CARBOB base fuel blends once the aromatic amine has been added. The base fuel blend will have a boiling point in the range of 130° C. to 180° C. These base blending materials are known to those skilled in the art. CBOB stands for conventional blend stock for oxygenated blending. RBOB stands for reformulated blend stock for oxygenated blending. CARBOB stands for California reformulated blend stock for oxygenate blending.
Finally, by eliminating or substantially reducing the content of olefins and aromatics in the base fuel blend, the base fuel blend will have a PONA distribution that is different from current base fuels. As known to those skilled in the art, the ratio of paraffins, olefins, naphthene and aromatics is known as the fuels PONA. Typical base fuels have PONA's as follows:
Thus, by increasing the ethanol portion of the final blend, the blended gasoline composition further reduces the release of non-renewable carbon into the atmosphere. Additionally, of the PONA material, paraffins have the highest energy content per pound. Thus, maximizing the paraffins in the blended gasoline composition has the effect of decreasing the amount of fuel required to produce the same energy release as currently available gasolines. Further, removal of the aromatics and olefin content and increasing the paraffin content advantageously raises the hydrogen to carbon ratio of the blended gasoline composition while also taking advantage of the octane blending synergy of paraffins and ethanol. Further, reducing the aromatics and olefins in the base fuel, reduces the octane suppression factor aromatics and olefins have on ethanol. Likewise, reducing the aromatics in the base fuel reduces the negative octane blending factor exhibited between aromatics and paraffins. Data concerning the release of atmospheric carbon dioxide is provided in Table 4 below. The focus of Table 4 is on the reduction of the release of carbon dioxide to the atmosphere.
To provide a blended gasoline composition having the necessary octane value for over the road and off road use, the blended gasoline composition also includes between about 10% and about 20% ethanol. Typically, the blended gasoline composition contains between about 10% and 15% ethanol. Additionally, the blended gasoline composition contains an octane booster in the form of an aromatic amine. Suitable aromatic amines included, but are not limited to: aniline, m-toluidine, o-toluidine, p-toluidine and mixtures thereof. Typically, the blended gasoline composition contains up to 5% by volume of the octane booster. More commonly, the blended gasoline composition contains up to 4% by volume of the octane booster. Typically, the blended gasoline composition contains about 3% by volume of the octane booster. More typically the blended gasoline composition contains about 2% by volume of the octane booster. In most instances, the octane booster is m-toluidine at a concentration of about 1% to about 4% by volume.
In preparation of final gasoline compositions, refineries may blend several feed streams together. As known to those skilled in the art, true octane numbers do not blend linearly. Thus, one cannot simply blend a 50:50 mixture of two components and expect to always obtain an octane value equal to the volumetric average of the octane values of each component. Although some octane boosters have a generally known value when combined with current base fuel blends the octane value of boosters may vary depending on the composition of the selected base fuel blend. Typically, the final octane value of the resulting blend will be determined by conventional laboratory testing methods.
For example, a blend of 97% by volume high paraffinic naphtha and 3% by volume m-toluidine was subjected to octane testing. The naphtha had a lab measured RON octane number of 55. The blend of naphtha with m-toluidine had a lab measured octane number of RON 73.3. Using the following formula, one can determine the calculated octane blending value of an octane booster:
[(% Fuel A)(Octane of Fuel A)]+[(% Fuel B)(Octane of Fuel B)]=Octane of Mixture
Thus, to determine the octane blending value of m-toluidine:
(0.97 naphtha)(55)+(0.03 m-toluidine)(X)=73.3 laboratory tested octane number
Solving for X, 665 is the blended octane value for m-toluidine. This blended octane value for m-toluidine is unique and previously unknown to those skilled in the art as no other octane booster is known to have a blended octane value greater than 250. The blended octane value of aromatic amines is influenced by the composition of the base gasoline. For instance, olefins and non-amine aromatics in the gasoline will depress the blended octane value of m-toluidine to as low as 300 in the disclosed blended gasoline composition.
By way of another example, in most instances the ethanol component will be added following the addition of the aromatic amine. Using the foregoing example of 97% by volume naphtha and 3% by volume m-toluidine, the fuel had an octane value of RON 73.3. In this example, 15% ethanol was added by volume to the fuel having the RON of 73.3 to increase the octane value to a lab tested RON of 84.4. Thus, applying the above formula:
(0.85 naphtha/m-toluidine)(73.3)+(0.15 ethanol)(X)=84.4 lab tested octane number
Solving for X, 147.3 is the blended octane value for ethanol in this blended fuel. In contrast, pipelines require gasoline producers to use ethanol octane blending values of only 115 in their current gasolines CBOB, RBOB and CARBOB. Thus, the disclosed formulation realizes a significant increase in the octane blending value of ethanol. As with the aromatic amines, the presence of olefins and non-amine aromatics will depress the blended octane value of ethanol to as low as 130 in the disclosed blended gasoline composition.
In the production of the disclosed blended gasoline composition, the sequence of blending will likely be the initial formulation of a base fuel followed by the addition of an aromatic amine. The aromatic amine will likely be added at the refinery to create the CBOB, RBOB and CARBOB base blends. Subsequently, ethanol will be added at an appropriate point in the distribution system to achieve the final desired AKI value.
For clarity, the blended gasoline composition may have the following components:
A desired formulation will substantially lower or eliminate aromatic and olefin content providing a blended gasoline composition having the following components:
A particularly desired formulation will eliminate aromatic and olefin content providing a blended gasoline composition having the following components:
In most instances, the blended gasoline composition will contain 2%-4% m-toluidine and ethanol at concentrations between 10% and 15% while being free of other aromatic compounds and free of olefins. Table 1 below compares the non-amine aromatic content of a commonly available winter gasoline formulation to the non-amine aromatic content of the disclosed blended gasoline composition. Table 1 also demonstrates the reduction of non-amine aromatic content when the disclosed blended gasoline composition is combined in a 50:50 mixture with the same winter gasoline formulation. Thus Table 1 also demonstrates that the disclosed blended gasoline composition is miscible with currently available gasolines and the corresponding mixture of currently available winter or summer gasoline can be blended with the disclosed blended gasoline composition for distribution as a final gasoline composition for use by consumers.
TABLE 1
Aromatic Content
Miscibility
Test Formulation
50% volume BGC and
Winter
50% volume Winter
Gasoline
BGC
Gasoline
Benzene
vol %
0.39
0
0.20
Toluene
vol %
4.00
0
2.00
Ethyl Benzene
vol %
0.88
0
0.44
meta-Xylene
vol %
2.62
0
1.31
para-Xylene
vol %
1.01
0
0.51
ortho-Xylene
vol %
1.39
0
0.70
isopropyl
vol %
0.12
0
0.06
Benzene
n-Propyl Benzene
vol %
0.28
0
0.14
meta-
vol %
0.94
0
0.47
Ethyltoluene
para-Ethyltoluene
vol %
0.42
0
0.21
1,2,5 Trimethyl-
vol %
0.43
0
0.22
benzene
ortho-
vol %
0.35
0
0.18
Ethyltoluene
1,2,4
vol %
1.69
0
0.85
Trimethylbenzene
1,2,3
vol %
0.38
0
0.19
Triethylbenzene
Indane
vol %
0.12
0
0.06
4-methyl Indane
vol %
0.05
0
0.03
5-methyl Indane
vol %
0.07
0
0.04
Naphthalene
vol %
0.09
0
0.05
2-methyl
vol %
0.05
0
0.03
Naphthalene
1-methyl
vol %
0.03
0
0.02
Naphthalene
C10 Aromatics
vol %
1.83
0
0.92
C11 Aromatics
vol %
0.05
0
0.03
Dimethyl lndanes
vol %
0.07
0
0.04
Total non-amine
vol %
17.26
0.00
8.63
Aromatic
As reflected in Table 2 below, the blended gasoline composition is characterized as having an AKI of at least 87. While an AKI of 87 is the minimum for the blended gasoline composition, manipulation of the base fuel blend, the octane booster and ethanol content may provide higher AKI values up to about 100 when blending 20% ethanol, 5% m-toluidine and 75% CBOB. Additionally, Table 2 reflects the ability of the blended gasoline composition to satisfy the API specific gravity and RVP values for winter and summer blends.
TABLE 2
Lab Data Summary
Miscibility
Test
50% Vol
Winter
Blended
Winter
Gasoline
Gasoline
Baseline
87E10
Composition
50% Vol
Purchased
(BGC)
BGC
Gasoline
Gasoline
Gasoline
Gravity, API
63.5
70
ASTM D-4052
Specific Gravity
0.726
0.702
0.714
Oxygenates
10%
15%
12.5%
Distillation
IBP
77.3
82.2
79.75
ASTM D-86
10
106.5
115.7
111.1
50
152.8
151.3
152.05
90
311.1
244.8
277.95
FBP
392.7
390.2
391.45
Octane (AKI)
87.45*
86.8*
87.35*
R + M/2
Research Octane Number
91.1
88.5
90
ASTM D-2699
Motor Octane Number
83.8
85.1
84.7
ASTM D-2700
RVP (psi)
12.87
12.78
12.83
ASTM D-5191
Aromatics - vol %
17.26
0
8.63
ASTM D-5769
*Lab test result - reflects that blending of the blending gasoline composition with conventional gasoline does not negatively impact the AKI value.
TABLE 3
Heat of Combustion and Carbon/Hydrogen/Nitrogen/Oxygen values
Heat of
Combustion
BTU/lb
Blended
per ASTM
Winter
Summer
Gasoline
D-240
Gasoline
Gasoline
Composition
Gross
19242
18547
19050
Net
17895
17718
Carbon/Hydrogen/Nitrogen weight % per ASTM D-5291
Carbon wt %
82.02
83.16
78.21
Hydrogen wt %
14.20
13.18
15.18
Nitrogen wt %
0.00
0.00
0.75
Oxygen wt %
3.78
3.65
5.86
m-Toluidine,
0.0%
0.0%
4.0%
Vol %
A further characteristic of the disclosed blended gasoline composition is the ability of this composition to safely blend with current gasoline stocks.
Table 4, provided below, demonstrates the environmental improvements provided by use of the blended gasoline composition in replace of current winter and summer gasoline blends of available gasoline. The table provides data based on an annual gasoline consumption (2019) of 150 billion gallons per year. In the United States, gasoline is typically sold in Winter and Summer gasolines. Table 4 compares the combined total for the assumed Winter and Summer gasolines to the disclosed blended gasoline composition prepared using paraffinic naphtha. Renewable fuels such as ethanol and renewable naphtha are considered carbon neutral. Renewable naphtha is obtained as a waste product from the manufacture of renewable diesel and/or renewable jet fuel. Specifically, the biomass (e.g. corn and sugarcane) used in preparation of the renewable fuels absorbs CO2 as it grows. The capture of CO2 during the growth of the biomass may offset the CO2 when the renewable fuel is burned.
The calculations in Tables 4-5 reflect the expected CO2 reduction provided by using the blended gasoline composition in lieu of currently available summer/winter gasolines after subtracting out the renewable carbon derived from the use of ethanol. For this calculation, the remaining non-ethanol hydrocarbons in the fuel blend are considered to be from fossil fuel, i.e. non-renewable hydrocarbons. Table 7 below reflects the formulation of the blended gasoline composition used in the test results of Tables 4-6. Table 8 below provides one example of the hydrocarbon distribution of naphtha suitable for use in the disclosed blended gasoline composition. Of course, a renewable naphtha having the same distribution of hydrocarbons is also suitable for use in the disclosed blended gasoline composition. For the purposes of this disclosure naphtha includes both paraffins and naphthenes having carbon chains from C4 to C12 and traces of C13 and higher as described in Table 8. As discussed above, renewable naphtha is a biproduct of the manufacture of renewable diesel and renewable jet fuel/kerosene. Therefore, when using renewable naphtha, the resulting blended gasoline composition may have nearly a net zero carbon emission contribution for the reasons discussed above.
TABLE 4
Environmental Improvements provided by the Blended Gasoline Composition
Based on U.S. Usage of 150 Billion Gallons of Gasoline Per Year
Blended Gasoline
Winter Gasoline
Summer Gasoline
Composition
Summer/
40%
60%
Winter Split
USA Gasoline
60,000,000,000
90,000,000,000
156,421,844,955
Consumption
in
gallons/year
Total
363,508,200,000
564,338,970,000
916,609,955,957
Gasoline
usage in
pounds/year
Total Energy
6,994,624,784,400,000
10,466,794,876,590,000
17,461,419,660,990,000
Content in
BTU/year
Energy
19,242
18,547
19,050
Content, in
BTU/lb.
Pounds of
363,508,200,000
564,338,970,000
916,609,955,957
Gasoline
used per year
Chemical
Composition
Carbon, wt %
82.02%
83.16%
78.21%
Hydrogen,
14.20%
13.18%
15.18%
wt %
Oxygen, wt %
3.78%
3.65%
5.86%
Nitrogen,
0.75%
wt %
Total Moles
24,845,133,689
39,110,609,092
59,740,898,809
Carbon (CO2)
Total Moles
25,812,823,082
37,198,132,031
69,549,106,077
of Hydrogen
Total Moles
858,809,348
1,288,462,302
3,358,413,566
of Oxygen
Fuel Density
0.726
0.751
0.702
as specific
gravity
Gallons of
6,000,000,000
9,000,000,000
23,463,276,743
ethanol used
for each
gasoline type
Ethanol
85,430
85,430
85,430
heating
value,
BTU/gal
Total heat
512,580,000,000,000
768,870,000,000,000
2,004,467,732,178,730
content of
ethanol
Density of
0.789
0.789
0.789
ethanol as
specific
gravity
Total pounds
39,505,230,000
59,257,845,000
154,487,024,050
of ethanol
Ethanol, wt %
52.17%
52.17%
52.17%
carbon
Total moles
1,717,618,696
2,576,428,043
6,716,827,133
of carbon
from ethanol
(CO2)
(Renewable
Carbon)
Gallons of
54,000,000,000
81,000,000,000
132,958,568,212
CBOB used in
each gasoline
type on an
annual basis
Estimated
16,200,000,000
24,300,000,000
0
gallons of
reformate
required
when the
blend of
gasoline uses
30% (on an
annual basis)
Estimated
20,250,000,000
30,375,000,000
0
gallons of
reformer
feed at 80%
yield
required on
an annual
basis
Barrels of
482,142,857
723,214,286
0
reformer
feed on an
annual basis
Reformer
264,000
264,000
264,000
energy
requirement
BTU/barrel of
feed on an
annual basis
Total
127,285,714,285,714
190,928,571,428,571
0
reformer
process
energy
requirement,
BTU on an
annual basis
Fired heater
169,714,285,714,286
254,571,428,571,429
0
duty @ 75%
efficiency,
BTU
Methane
23,811
23,811
23,811
heating
value, HHV,
BTU/lb
Methane, lbs
7,127,558,091
10,691,337,137
0
Reformer
445,472,381
668,208,571
0
moles of
carbon
release on an
annual basis
Total moles
25,290,606,070
39,778,817,663
59,740,898,809
of carbon
with
reformer
release on an
annual basis
Net moles of
23,572,987,374
37,202,389,619
53,024,071,677
carbon with
renewable
carbon from
ethanol
removed on
an annual
basis
Carbon
0.0000404
0.0000427
0.0000364
release per
unit of
energy, (lbs.
of
carbon/BTU)
Annual %
9.90%
14.56%
carbon
reduction
due to use of
the Blended
Gasoline
Composition
compared to
the subject
base fuel
With reference to Table 4, one can readily recognize that the use of the disclosed blended gasoline composition significantly reduces the release of carbon into the atmosphere. Comparing the carbon release attributed to the Winter Gasoline to that of the blended gasoline composition, the blended gasoline composition reduces carbon dioxide emission by 9.90% on an annual basis. Further, when comparing the Summer Gasoline to that of the blended gasoline composition, the blended gasoline composition reduces carbon dioxide emission by 14.56% on an annual basis. Additionally, the reduced reliance upon use of the catalytic reformer process will further reduce carbon dioxide emission.
The following Table 5 provides further data on carbon and CO2 reductions resulting from the use of the blended gasoline composition. As reflected in Row F of Table 5, use of the blended gasoline composition is expected to reduce CO2 emissions by 12.75% simply due to changing the composition of the gasoline burned. Row I of Table 5 further demonstrates the savings in CO2 emissions due to use of the blended composition and includes the savings in CO2 emissions resulting from reduced dependency on the use of the catalytic reformation process. According to the data provided, the expected overall reduction in U.S. CO2 emissions is 2.68%.
TABLE 5
Reduction in Carbon Dioxide Emission
A
Total moles of carbon resulting from combustion of
65,069,423,733
winter and summer gasoline on an annual basis
B
Total moles of carbon resulting from combustion of
60,775,376,993
winter and summer gasoline on an annual basis - after
deleting renewable carbon attributed to ethanol
C
Estimated total mole of carbon resulting from
59,740,898,809
combustion of the Blended Gasoline Composition
D
Estimated total mole of carbon resulting from
53,024,071,677
combustion of the Blended Gasoline Composition -
after deleting renewable carbon attributed to ethanol
E
Net moles of carbon reduction resulting from use of the
7,751,305,317
Blended Gasoline Composition (Row B- Row D)
F
Percent Reduction in CO2 provided from use of the
12.75%
Blended Gasoline Composition (Row E/Row B × 100)
G
Reduction in CO2 Emissions measured in Million Metric
155
Tons on an annual basis
H
Per the EPA, the United States 2019 release of CO2 in
5,788
Million Metric Tons
I
Percent Reduction in United States release of CO2 on an
2.68%
annual basis (Row G/Row H × 100)
Table 6 below provides estimates reflecting the beneficial reduction in refinery operations resulting from use of the disclosed blended gasoline composition. In addition to the previously discussed reduction in operation of the catalytic reformers at refineries, Table 6 demonstrates that use of the blended gasoline composition should also lead to an overall reduction in refinery barrels per day processed. The reduction in refinery processing is a result of the overall lower requirement for the base fuel. Additionally, the use of the disclosed blended gasoline composition simplifies the composition of the base fuel as described in Table 8 below.
TABLE 6
Estimated Naphtha Required Per Gasoline Type
Winter
Summer
Blended Gasoline
Gasoline
Gasoline
Composition
A
CBOB gallons/year required for
54,000,000,000
81,000,000,000
132,958,568,212
blending each type of gasoline
B
Reformer yield Loss per year
4,050,000,000
6,075,000,000
0
attributed to refining of each
type of gasoline
C
Total naphtha for each type of
58,050,000,000
87,075,000,000
132,958,568,212
gasoline (gallons)
D
Total combined naphtha for
145,125000,000
summer and winter gasolines
E
Net reduction in gallons/year of
12,166,431,788
naphtha required resulting from
use of the Blended Gasoline
Composition as compared to
the winter and summer
gasolines
(Row D - Row C BGC)
F
Net reduction in barrels/year of
289,676,947
naphtha required resulting from
use of the Blended Gasoline
Composition as compared to
the winter and summer
gasolines
G
Net reduction in barrels/day of
827,648
naphtha required resulting from
use of the Blended Gasoline
Composition as compared to
the winter and summer
gasolines
H
Estimated reduction in barrels
413,824
per day processed by refineries
operating at a 50% naphtha
yield for use in the Blended
Gasoline Composition
I
2019 EPA total refinery crude
18,600,000
capacity - million barrels per
day
J
Crude throughput at 80% of
14,880,000
refinery capacity - million
barrels per day
K
Estimated percent reduction in
2.78%
barrels per day processed by
refineries resulting from use of
the Blended Gasoline
Composition (Row H/Row J ×
100)
TABLE 7
Example Composition of the Blended
Gasoline Composition
Blended Gasoline
Composition
Vol %
Naphtha
81
Ethanol
15
m-toluidine
4
Total
100
TABLE 8
Naphtha Hydrocarbon Distribution
(Volume Percent)
C4
0-10%
C5-C6
25-40%
C7-C8
30-50%
C9-C10
3-30%
C11-C12
0-25%
C13 and
0-5%
higher
With continued reference to Tables 4-5, the resulting carbon released into the atmosphere due to motor vehicle use of summer and winter current blends of gasoline is over 60 billion moles. This total includes carbon release due to operation of catalytic reformers in the refineries. In contrast, the blended gasoline composition disclosed herein does not rely upon products prepared by the catalytic reformers, e.g. aromatic hydrocarbons. As discussed above, with the exception of the aromatic amine octane booster compounds, the blended gasoline composition contains minimal concentrations of aromatic compounds. Thus, use of reformate from the catalytic reformer can be eliminated such that the aromatic compounds in the blended gasoline composition result primarily from naturally occurring aromatics in the crude oil. More directly, Table 9 shows the expected Carbon Release per Unit of Energy in pounds of Carbon per BTU upon burning of the respective gasoline compositions in an internal combustion engine.
TABLE 9
Expected Carbon Release per Unit of Energy - pound/BTU
Current Summer Gasoline
0.0000427 pound/BTU
Current Winter Gasoline
0.0000404 pound/BTU
Blended Gasoline Composition
0.00004 or less
pound/BTU
Using data found in Table 4, the carbon release per unit of energy for the blended gasoline composition may be as low as 0.0000364 pound per BTU when the blended gasoline composition is burned in an internal combustion engine. See Table 4, the row titled “Carbon release per unit of energy, (lbs. of carbon/BTU).”
Thus, eliminating the need for catalytic reformation in the refining process further reduces the release of carbon dioxide to the atmosphere. The catalytic reforming process typically results in a 20% yield loss on feed. By minimizing the need for use of the catalytic reforming process in the refining and production of gasoline, refinery crude rates will decrease an estimated 3% for the same gasoline production. Likewise, CO2 reductions will be significant for the entire manufacturing chain of crude oil production, transportation, storage, and refining as less crude oil is required to be processed into gasoline.
In total, the blended gasoline composition disclosed herein provides for approximately 12% less carbon dioxide (CO2) emissions than currently available gasoline formulations. The 12% reduction in carbon dioxide emission provides a reduction of approximately 155 million metric tons of carbon dioxide. As an additional benefit, the substantial reduction and/or elimination of aromatic hydrocarbons from gasoline reduces consumer exposure to known carcinogenic compounds.
Other embodiments of the present invention will be apparent to one skilled in the art. As such, the foregoing description merely enables and describes the general uses and methods of the present invention. Accordingly, the following claims define the true scope of the present invention.
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